package array.part1;
/**
 * ⑤ 数组元素的默认初始化值
 *  > 数组元素是整型：0
 *  > 数组元素是浮点型：0.0
 *  > 数组元素是char型：0或'\u0000'，而非'0'
 *  > 数组元素是boolean型：false
 *
 * <p>> 数组元素是引用数据类型：null
 *
 * <p>⑥ 数组的内存解析
 */
public class ArrayTest1 {

  public static void main(String[] args) {
    // 5.数组元素的默认初始化值
    int[] arr = new int[4];
    for (int i = 0; i < arr.length; i++) {
      System.out.println(arr[i]);
    }
    System.out.println("**********");

    short[] arr1 = new short[4];
    for (int i = 0; i < arr1.length; i++) {
      System.out.println(arr1[i]);
    }
    System.out.println("**********");
    float[] arr2 = new float[5];
    for (int i = 0; i < arr2.length; i++) {
      System.out.println(arr2[i]);
    }

    System.out.println("**********");
    char[] arr3 = new char[4];
    for (int i = 0; i < arr3.length; i++) {
      System.out.println("----" + arr3[i] + "****");
    }

    if (arr3[0] == 0) {
      System.out.println("你好！");
    }

    System.out.println("**********");
    boolean[] arr4 = new boolean[5];
    System.out.println(arr4[0]);

    System.out.println("**********");
    String[] arr5 = new String[5];
    System.out.println(arr5[0]);
    if (arr5[0] == null) {
      System.out.println("北京天气不错！");
    }
  }
}
